通風系統系統分類

1、按通(tong)風動(dong)力分類：自(zi)然通(tong)風 、機(ji)械通(tong)風；

2、按照(zhao)通(tong)風(feng)服務范圍： 全面通(tong)風(feng) 、局部(bu)通(tong)風(feng)；

3、按氣流方向分類：送（進）、排風（煙）；

4、按通(tong)風(feng)目的分類： 一般換氣通(tong)風(feng)、熱風(feng)供暖、排毒與除塵、事故通(tong)風(feng)、防護式通(tong)風(feng)、建筑防排煙(yan)等；

5、按動力(li)所處的(de)位置分類：動力(li)集(ji)中式和動力(li)分布式。

通風系統系統功能

1、用室外(wai)的(de)(de)新(xin)鮮空(kong)(kong)氣更新(xin)室內(nei)由于(yu)居住及生活過程而污染了的(de)(de)空(kong)(kong)氣，以保(bao)持(chi)室內(nei)空(kong)(kong)氣的(de)(de)潔(jie)凈度達到某一最(zui)低標準的(de)(de)水平(ping)。

2、增加體內散熱及防止由皮膚潮(chao)濕引起的不舒適，此(ci)類通風可稱(cheng)為熱舒適通風。

3、當(dang)室內氣溫(wen)高于室外的氣溫(wen)時，使建筑(zhu)構件降(jiang)溫(wen)，此類通風名為(wei)建筑(zhu)的降(jiang)溫(wen)通風。

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通風系統的組成

通風(feng)(feng)系統一(yi)般由通風(feng)(feng)設備、通風(feng)(feng)管道(dao)、消(xiao)聲器、風(feng)(feng)機、控制系統組成。

1、通風設備

實(shi)驗室常用通(tong)(tong)(tong)風設(she)備主要有排毒(du)(du)柜(ju)(ju)(ju)、原(yuan)子吸(xi)收(shou)罩(zhao)、萬(wan)向(xiang)排氣(qi)罩(zhao)、桌面(mian)式通(tong)(tong)(tong)風罩(zhao)等(deng)。排毒(du)(du)柜(ju)(ju)(ju)是安全處理有害(hai)、有毒(du)(du)氣(qi)體(ti)或蒸汽的(de)(de)(de)通(tong)(tong)(tong)風設(she)備，作用是用來捕捉、密封和轉移污(wu)(wu)(wu)染(ran)物(wu)以及有害(hai)氣(qi)體(ti)，防止其逃逸到實(shi)驗室內，這樣通(tong)(tong)(tong)過(guo)吸(xi)入工作區(qu)域的(de)(de)(de)污(wu)(wu)(wu)染(ran)物(wu)，使操(cao)作者吸(xi)入接觸的(de)(de)(de)污(wu)(wu)(wu)染(ran)物(wu)最(zui)小化(hua)。排毒(du)(du)柜(ju)(ju)(ju)內的(de)(de)(de)氣(qi)流是通(tong)(tong)(tong)過(guo)排風機將實(shi)驗室內的(de)(de)(de)空氣(qi)吸(xi)進排毒(du)(du)柜(ju)(ju)(ju)，將排毒(du)(du)柜(ju)(ju)(ju)內污(wu)(wu)(wu)染(ran)的(de)(de)(de)氣(qi)體(ti)桸釋并通(tong)(tong)(tong)過(guo)通(tong)(tong)(tong)風系(xi)統排到戶外后，可以達到低濃(nong)度擴散。

2、通風管道

對(dui)于一般(ban)的普通建(jian)筑，若(ruo)室內排(pai)出的氣(qi)體沒有腐蝕性(xing)，通風(feng)管(guan)(guan)道(dao)可以采用(yong)鍍鋅鋼(gang)板(ban)，對(dui)于產生(sheng)有腐蝕性(xing)氣(qi)體的實驗室，風(feng)管(guan)(guan)應采用(yong)耐(nai)腐蝕材料的PVC風(feng)管(guan)(guan)或玻(bo)璃鋼(gang)風(feng)管(guan)(guan)。在(zai)一般(ban)的實驗室通風(feng)工程(cheng)，室內大多(duo)采用(yong)PVC風(feng)管(guan)(guan)、室外采用(yong)玻(bo)璃鋼(gang)風(feng)管(guan)(guan)。

3、風機

風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)主(zhu)要(yao)有軸流風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)、斜流風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)、離心風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)。軸流風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)、斜流風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)適用于風(feng)(feng)(feng)(feng)(feng)(feng)壓小(xiao)、管(guan)路短(duan)的(de)(de)(de)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)(feng)系統，如直接(jie)排(pai)(pai)至(zhi)窗外或(huo)墻外的(de)(de)(de)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)(feng)系統，簡稱直排(pai)(pai)；玻離鋼離心風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)適用于管(guan)路長的(de)(de)(de)的(de)(de)(de)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)(feng)系統，如通(tong)(tong)過風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)井(jing)或(huo)外墻接(jie)管(guan)排(pai)(pai)至(zhi)屋頂，簡稱屋頂排(pai)(pai)放。風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)的(de)(de)(de)材質：一(yi)般分為玻璃(li)鋼、PP、PVC等。風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)的(de)(de)(de)型號根據風(feng)(feng)(feng)(feng)(feng)(feng)量(liang)和風(feng)(feng)(feng)(feng)(feng)(feng)壓選擇。

4、通風控制系統

通(tong)風(feng)(feng)(feng)控(kong)(kong)(kong)制(zhi)系(xi)(xi)統(tong)可根據不同(tong)的情(qing)況采(cai)用不同(tong)的控(kong)(kong)(kong)制(zhi)方式，如，單臺(tai)通(tong)風(feng)(feng)(feng)設備(bei)(bei)定風(feng)(feng)(feng)量通(tong)風(feng)(feng)(feng)控(kong)(kong)(kong)制(zhi)系(xi)(xi)統(tong)、多臺(tai)通(tong)風(feng)(feng)(feng)設備(bei)(bei)變(bian)頻(pin)控(kong)(kong)(kong)制(zhi)系(xi)(xi)統(tong)、多臺(tai)通(tong)風(feng)(feng)(feng)設備(bei)(bei)變(bian)頻(pin)+變(bian)風(feng)(feng)(feng)量通(tong)風(feng)(feng)(feng)控(kong)(kong)(kong)制(zhi)系(xi)(xi)統(tong)。